Komatsu 830E-AC Shop Manual page 33

6. DO NOT weld on the rear of the control cabinet!
The metal panels on the back of the cabinet are
part of capacitors and cannot be heated.
7. DO NOT weld on the retard grid exhaust lou-
vers - they are made of stainless steel. Some
power cable panels throughout the truck are
also made of aluminum or stainless steel. They
must be repaired with the same material or the
power cables may be damaged.
8. Power cables must be cleated in wood or other
non-ferrous materials. DO NOT repair cable
cleats by encircling the power cables with metal
clamps or hardware. Always inspect power
cable insulation prior to servicing the cables and
prior to returning the truck to service. Discard
cables with broken insulation.
9. Power cables and wiring harnesses should be
protected from weld spatter and heat.
Always fasten the welding machine ground (-)
lead to the piece being welded; the grounding
clamp must be attached as near as possible to
the weld area.
Always avoid laying welding cables over or
near the vehicle electrical harnesses. Welding
voltage could be induced into the electrical har-
ness and cause damage to components.
Before doing any welding on the truck, always
disconnect the battery charging alternator lead
wire and isolate electronic control components.
In addition, always disconnect the positive and
negative battery cables of the vehicle. Failure
to do so may seriously damage the battery and
electrical equipment.
Never allow welding current to pass through
ball bearings, roller bearings, suspensions, or
hydraulic cylinders.
A03030 3/06
Notify your Komatsu service representative,
immediately. Only qualified personnel, specifi-
cally trained for servicing the A-C drive system,
should perform this service.
General Safety and Operating Instructions
10. If the red lights on the exterior of the control
cabinet and/or the back wall of the center con-
sole continue to be illuminated after following
the above procedure, a fault has occurred.
Leave all cabinet doors in place; DO NOT touch
the retard grid elements; DO NOT disconnect
any power cables, or use them as hand or foot
holds.
11. Replace all covers and doors and place the GF
cutout switch and battery disconnect switches
in their original positions. Reconnect all har-
nesses prior to starting the truck.
Leave the drive system in the rest mode until
the truck is to be moved.
A3-19